Hydrographical basin of the upper Mississippi river from astronomical and barometrical observations, surveys and information / by J.N. Nicollet in the years 1836, 37, 38, 39 and 40, assisted in 1838, 39 & 40, by Lieut. J.C. Fremont, of the Corps of topographical engineers and authorized by the War department. Reduced and comp. under the direction of Col. J.J. Abert...by Lieut. W.H. Emory from th[e map published in 1842 and from other authorities in 1843].
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